Hang up the key, Cat!
This is probably the perfect version of the cat key hook.
Other versions of the lever stick to the box, not be strong enough to break. I designed it separately, using a length of filament as a shaft, and the movement is very silky.

（挂上钥匙，猫猫冒头！
这可能是猫钥匙挂钩最完美的版本。
其他版本的杠杆会粘在盒子里，强度堪忧，容易断。我将他分开设计，用一段耗材丝做轴，活动非常丝滑。）

Installation video（安装视频）：https://www.bilibili.com/video/BV1Qh4y1c7wS/?spm_id_from=333.999.0.0&vd_source=cc2d300f8e649a9b7c4790f073b8ddf5

The installation steps begin in 1:21 of the video（安装步骤在视频1分21秒开始）

After installation, only a sponge double-sided tape can be glued to the wall（安装好后只需一片海绵双面胶即可粘在墙上）